Figure 8. Scattergrams of variance at C = 1.0 versus variance at C = 0 for the DC response (F₀), left column, and the fundamental Fourier component (F₁), right column.

Responses of magnocellular (MC) cells are shown in A and B. Responses of koniocellular (KC) blue-on cells are shown in C and D. Variances plotted are V₀ and V₁, as defined by eqn (3). Error bars represent 95% confidence limits on the variance estimates for each neuron, as calculated by F statistics (see Appendix 1). Values are pooled across chromatic stimulation conditions for MC and KC blue-on cells. The shaded area in each graph shows an envelope of PC cell responses from Fig. 4A. Outliers from the PC distribution were removed by iterative (3x) enclosure with a convex hull and removal of points at the hull vertices. Note that the majority of points for both MC and KC blue-on cells show greater variance at C = 1 than at C = 0, and thus lie within the PC cell envelope.